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A Covalent Organic Framework as a Long-life and High-Rate Anode Suitable for Both Aqueous Acidic and Alkaline Batteries |
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| Authors: | Yilun Lin Huilin Cui Chao Liu Ran Li Shipeng Wang Guangmeng Qu Zhiquan Wei Yihan Yang Yaxin Wang Zijie Tang Hongfei Li Haiyan Zhang Chunyi Zhi Haiming Lv |
| Affiliation: | 1. School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006 China Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808 China These authors contributed equally to this work.;2. Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808 China Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077 China These authors contributed equally to this work.;3. School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006 China Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808 China;4. Yan'an Key Laboratory of Green Chemical Energy, Key Laboratory of New Energy & New Functional Materials, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi, 716000 P. R. China;5. Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808 China;6. Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077 China;7. School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006 China |
| Abstract: | Aqueous rechargeable batteries are prospective candidates for large-scale grid energy storage. However, traditional anode materials applied lack acid-alkali co-tolerance. Herein, we report a covalent organic framework containing pyrazine (C=N) and phenylimino (−NH−) groups (HPP-COF) as a long-cycle and high-rate anode for both acidic and alkaline batteries. The HPP-COF′s robust covalent linkage and the hydrogen bond network between −NH− and water molecules collectively improve the acid-alkaline co-tolerance. More importantly, the hydrogen bond network promotes the rapid transport of H+/OH− by the Grotthuss mechanism. As a result, the HPP-COF delivers a superior capacity and cycle stability (66.6 mAh g−1@ 30 A g−1, over 40000 cycles in 1 M H2SO4 electrolyte; 91.7 mAh g−1@ 100 A g−1, over 30000 cycles @ 30 A g−1 in 1 M NaOH electrolyte). The work opens a new direction for the structural design and application of COF materials in acidic and alkaline batteries. |
| Keywords: | Anode Aqueous Acidic Batteries Aqueous Alkaline Batteries Covalent Organic Frameworks |